Sadly it would appear not quoting the CAA Fodcom
When:
• acting as a pilot, cabin crew, flight engineer, flight navigator or flight radio-telephony operator of an
aircraft during flight;
• attending the flight deck of an aircraft during flight to give or supervise training, to administer a test,
to observe a period of practice or to monitor or record the gaining of experience; or
• acting as an air traffic controller in pursuance of a licence granted under or by virtue of an
enactment (other than a licence granted to a student):
The prescribed limit of alcohol is:
a. In the case of breath: 9 microgrammes of alcohol in 100 millilitres.
b. In the case of blood: 20 milligrammes of alcohol in 100 millilitres.
So we are told what an important role these security people and the Police have yet they appear to be beyond the law (Railways and Transport safety act) themselves.